Improve measuring

dart/sdk/lib/_internal/compiler/implementation/apiimpl.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library leg_apiimpl;
 
 import 'dart:uri';
 
 import '../compiler.dart' as api;
 import 'dart2jslib.dart' as leg;
@@ skipping 82 matching lines @@
     elements.LibraryElement library =
         libraryLoader.loadLibrary(uri, null, canonicalUri);
     return library;
   }
 
   void log(message) {
     handler(null, null, null, message, api.Diagnostic.VERBOSE_INFO);
   }
 
   leg.Script readScript(Uri uri, [tree.Node node]) {
-    if (uri.scheme == 'dart') uri = translateDartUri(uri, node);
-    var translated = translateUri(uri, node);
-    String text = "";
-    try {
-      // TODO(ahe): We expect the future to be complete and call value
-      // directly. In effect, we don't support truly asynchronous API.
-      text = provider(translated).value;
-    } catch (exception) {
-      if (node != null) {
-        cancel("$exception", node: node);
-      } else {
-        reportDiagnostic(null, "$exception", api.Diagnostic.ERROR);
-        throw new leg.CompilerCancelledException("$exception");
+    return fileReadingTask.measure(() {
+      if (uri.scheme == 'dart') uri = translateDartUri(uri, node);
+      var translated = translateUri(uri, node);
+      String text = "";
+      try {
+        // TODO(ahe): We expect the future to be complete and call value
+        // directly. In effect, we don't support truly asynchronous API.
+        text = provider(translated).value;
+      } catch (exception) {
+        if (node != null) {
+          cancel("$exception", node: node);
+        } else {
+          reportDiagnostic(null, "$exception", api.Diagnostic.ERROR);
+          throw new leg.CompilerCancelledException("$exception");
+        }
       }
-    }
-    SourceFile sourceFile = new SourceFile(translated.toString(), text);
-    return new leg.Script(uri, sourceFile);
+      SourceFile sourceFile = new SourceFile(translated.toString(), text);
+      return new leg.Script(uri, sourceFile);
+    });
   }
 
   Uri translateUri(Uri uri, tree.Node node) {
     switch (uri.scheme) {
       case 'package': return translatePackageUri(uri, node);
       default: return uri;
     }
   }
 
   Uri translateDartUri(Uri uri, tree.Node node) {
@@ skipping 19 matching lines @@
   Uri resolvePatchUri(String dartLibraryPath) {
     String patchPath = lookupPatchPath(dartLibraryPath);
     if (patchPath == null) return null;
     return libraryRoot.resolve(patchPath);
   }
 
   translatePackageUri(Uri uri, tree.Node node) => packageRoot.resolve(uri.path);
 
   bool run(Uri uri) {
     bool success = super.run(uri);
+    int total = 0;
     for (final task in tasks) {
+      total += task.timing;
       log('${task.name} took ${task.timing}msec');
     }
+    log('Cumulated ${total}msec');
     return success;
   }
 
   void reportDiagnostic(leg.SourceSpan span, String message,
                         api.Diagnostic kind) {
     if (identical(kind, api.Diagnostic.ERROR)
         || identical(kind, api.Diagnostic.CRASH)) {
       compilationFailed = true;
     }
     // [:span.uri:] might be [:null:] in case of a [Script] with no [uri]. For
     // instance in the [Types] constructor in typechecker.dart.
     if (span == null || span.uri == null) {
       handler(null, null, null, message, kind);
     } else {
       handler(translateUri(span.uri, null), span.begin, span.end,
               message, kind);
     }
   }
 
   bool get isMockCompilation {
     return mockableLibraryUsed
       && (options.indexOf('--allow-mock-compilation') != -1);
   }
 }